Among the various gems, the most spiritual gems are none other than the tourmaline. The mineral name of tourmaline is tourmaline, usually produced in the nucleus of granitic pegmatite and albite lithiated micro-plagioclase sodium long pegmatite. The history of tourmaline used to make gems is not long, but because of its bright colors and high transparency, it quickly won people's love. Tourmaline is one of the most complex gemstones in nature, with many varieties, but the only gemstones used are red tourmalines, green tourmalines, blue tourmalines, variegated tourmalines and cat-eye tourmalines. Generally, the red tourmaline is used as a female accessory, while the green and blue tourmaline is used as a male accessory, while the internal defects are large and the particles are large for carving jewelry. According to the color tourmaline, there are mainly the following varieties: Red tourmaline: A general term for pink to red tourmalines. It is usually colored by lithium and manganese. Red tourmaline is a high-value commodity in gem-quality tourmalines and is the most popular variety, mainly produced in Brazil and the United States. Green tourmaline: A general term for yellow-green to dark green and blue-green, brown-green tourmaline. Usually colored by chrome, mainly produced in Brazil, Sri Lanka, Italy. Blue tourmaline: The general term for light blue to deep blue tourmaline. Very rare, not easy to see, and a rare violet found in ParaÃba, Brazil. Multicolor tourmaline: Because the tourmaline ribbon is very developed, red and green dichroic bands appear on a single crystal. Some of the tourmalines are red in the middle, and the green is commonly called watermelon tourmaline. There is also a green in the middle, surrounded by red, collectively known as multicolor tourmaline. Cat's eye tourmaline: Since the tourmaline contains a large number of inclusions, when there are a large number of parallel fibrous fibers, tubular inclusions, and linear cavities, the cat's eye effect can be exhibited when grinding into a curved gemstone. Commonly green beetle cat eyes, a few are other colors. Color-changing tourmaline: For example, a tourmaline, in one direction, is blue-green under white light and pink under yellow light. The other direction is always green.
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